| labial bar | A major connector located labial to the dental arch joining two or more bilateral parts of a mandibular removable partial denture. (05 Mar 2000) |
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| lingual bar | A major connector located lingual to the dental arch joining two or more bilateral parts of a mandibular removable partial denture. (05 Mar 2000) |
| Louis-Bar | Denise, mid-20th century French physician. See: Louis-Bar syndrome. (05 Mar 2000) |
| Louis-Bar syndrome | ataxia telangiectasia |